Re: RB's real interest isn't space, that's just a bonus.
One news article said they'd burned (no pun intended) through most of their $400m from Aabar Investments and Virgin Group are now funding day-to-day operations. I imagine Aabar are hoping Branson will carry on piling Virgin's money into it so that they eventually see a return on their investment rather than just pulling the plug and calling it a bad job, as will the New Mexico State government who have poured $200m into Spaceport America specifically to attract the likes of Virgin Galactic, and who will not want one of their highest profile tenants to be packing up and calling it a day.
On the plus side, latest news reports are suggesting it was an errant feathering of flight controls rather than the rocket motor going boom, which suggests that it's an error in the flight software rather than a fundamental design or engineering problem which is going to send them back to the drawing board.
It's worrying that there's an error in there at all given the strict standards that such software is supposed to be written to, but initial reports would suggest there isn't fundamental flaw in the airframe or motor design that would require a total redesign of the package (and render the partially-complete VSS Voyager vehicle obsolete).